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crank fuel map

Posted: Fri Apr 13, 2007 11:38 am
by Civic Tsi
These looks more like RPM values than fuel values. Bug ??

Posted: Fri Apr 13, 2007 1:05 pm
by calvin
it's crank fuel values believe me

Posted: Fri Apr 13, 2007 1:19 pm
by nate
Yes these values are correct. I have had to extensively tweak this table... believe me it works :)

Posted: Fri Apr 13, 2007 2:20 pm
by Civic Tsi
Ok but I won't touch them till I know how they work. Care to explain please ?

Posted: Fri Apr 13, 2007 2:36 pm
by nate
The table is the fuel injected while cranking. Maybe Calvin can elaborate on exactly when this table is active during the cranking routine.

Posted: Fri Apr 13, 2007 2:40 pm
by calvin
Well the ecu looks up this value based on ECT and it's used during CRANK only....

Posted: Fri Apr 13, 2007 3:46 pm
by Civic Tsi
What I met is why these values are so high compare to the other tables ?

Posted: Sat Apr 14, 2007 2:06 am
by Gaskleppie
I ones saw an official Honda video about the PGMFI system. I saw 4 injectors in free air injecting incl the start cycle. I can tell you that in the first shot all 4 injectors fired at the same time a huge amount of fuel! Pretty impressive! I do think this was on a obd0 system. This video is very old!

Posted: Sat Apr 14, 2007 6:26 am
by CRX2
Gaskleppie wrote:I ones saw an official Honda video about the PGMFI system. I saw 4 injectors in free air injecting incl the start cycle. I can tell you that in the first shot all 4 injectors fired at the same time a huge amount of fuel! Pretty impressive! I do think this was on a obd0 system. This video is very old!
The video you saw probably was a demonstration tape for dealers. It was from 1992, and was a 1992 model Accord as far as I can remember. I still want to make a copy of it on DVD. When starting, all injectors are fired to improve first start. I think that this was a serious problem for some people. You know Karim, his car never would start when it was warm. They had to make a rolling start with it.... That problem probably could be solved by removing the starter signal to the ECU. I don't know if he tried it. Maybe his problem is solved in another way. I think his car was running with very large injectors and Crome then.